名词短语
中文翻译：近亲结婚同义词
同义词：
['血缘婚姻，亲兄妹结婚，直系亲属结婚']
例句：
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1. In some cultures, it is considered taboo for close relatives to marry each other.
在某些文化中，近亲结婚被视为禁忌。
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2. The couple's parents were both first cousins, which made the marriage unusual.
这对夫妇的父母都是第一代堂兄弟姐妹，这使得他们的婚姻不同寻常。
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3. The decision to marry within one's own family was a significant cultural shift in that era.
在那个时代，选择与自己的家族成员结婚是一个重大的文化转变。